CN209704671U - The impedance complex formula exhaust silencer of generating set - Google Patents
The impedance complex formula exhaust silencer of generating set Download PDFInfo
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- CN209704671U CN209704671U CN201920302665.6U CN201920302665U CN209704671U CN 209704671 U CN209704671 U CN 209704671U CN 201920302665 U CN201920302665 U CN 201920302665U CN 209704671 U CN209704671 U CN 209704671U
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Abstract
The utility model relates to a kind of impedance complex formula exhaust silencers of generating set, including exhaust silencer ontology, it is characterized in that: the exhaust silencer ontology includes resonant cavity and reducer, cylindrical resonator cavity body both ends are connected with reducer, impedance complex formula silencing channel is equipped in the resonant cavity, channel constitutes several resonant cavities by multistage resonance microwell plate, form impedance complex formula silencing channel, the microwell plate that resonates includes resistive absorbent treatment face plate, resonant cavity orifice plate and resonant cavity cavity plate, resonant cavity cavity plate shape is cylindrical, ring resonance orifice plate and the resistive sound absorption orifice plate of annular are successively equipped with from outside in resonant cavity cavity plate, resonant cavity is constituted between ring resonance orifice plate and the resistive sound absorption orifice plate of annular.The utility model has the advantages that the utility model forms silencing channel using the multistage resonance microwell plate for being resistant to 600 DEG C, it not only can divulge information but also can eliminate the noise, and resistive and reactive muffling can be made to reach optimum value, sound level sound deadening capacity reaches 35dB (A).
Description
Technical field
The utility model belongs to the impedance complex formula exhausting silencer of mechanical devolatilisation field more particularly to a kind of generating set
Device.
Background technique
The pressure at expulsion of general diesel generating set is about 0.3~0.5MPa, and about 500~700 DEG C of temperature, exhaust is made an uproar
Sound is higher and has broadband character.The effect of generating set exhaust silencer is by gradually decreasing pressure at expulsion and decaying
Exhaust noise is cut down in the pulsation of pressure at expulsion.Exhaust silencer type is divided into reactive muffler, resistance noise reduction by noise-cancelling theory
Device and impedance composite muffler three categories.
Reactive muffler: noise-cancelling theory is by being composed several expansions by the short tube and cell of different abrupt-change cross sections
Room reaches noise elimination effect.Each expansion chambers have the intrinsic frequency of oneself.When the sound wave for including various frequency contents enters the
When one short tube, the frequency sound waves near only corresponding intrinsic frequency could be reached second short by the hole on short tube
Nozzle, and the sound wave of other frequencies cannot then pass through the hole on short tube.It chooses pipe appropriate and room is combined and can filter
The noise of certain frequency contents, to achieve the purpose that noise elimination.Resistant noise-reducing device is suitable for eliminating, low-frequency noise.
Resistive muffler: noise-cancelling theory is to form silencing channel using sound-absorbing porous material to act on to reach noise elimination.Suction
Sound material is fixed on the inner wall of airflow channel or arranges in the duct according to certain way, just constitutes resistive muffler.When
When sound wave enters resistive muffler, a part of sound can rub in the hole of porous material and be converted to thermal energy consumption and dissipate, and make to lead to
The sound wave for crossing muffler weakens.Resistive muffler is good to medium-high frequency noise elimination effect, poor to low frequency noise elimination effect.
Impedance complex formula muffler: it is combined and is constituted according to certain mode by resistive structures and resistance structure.Patent document
Publication number 201747435U discloses a kind of impedance composite water-cooled muffler for diesel generator set, including closed shell,
Air inlet pipe, exhaust pipe, Perforated clapboard, set that there are two expansion cavity, the first expansion cavity and the second expansion cavity, the first expansion cavities in shell
Sound-absorbing material layer is equipped with on the inner sidewall of the second expansion cavity；Air inlet pipe enters the first expansion by the lower part of silencer side
Chamber, exhaust pipe are arranged in the second expansion cavity, and the turnover of the upper end of exhaust pipe is placed on the outside of silencer, the first expansion cavity and the
It is connected between two expansion cavities by U-shaped communicating pipe.Cooling jacket is formed between shell and sound-absorbing material layer, shell is equipped with water inlet
And discharge outlet.
Generation current unit exhaust silencer Technical comparing is mature, three categories silencer reactive muffler, dissipative muffler
There is application with impedance composite muffler.Configuration level-one exhaust silencer that exhaust silencer has according to different use occasions,
Some configuration secondary exhaust silencers, wherein level-one exhaust silencer is directly configured by generating set producer, and secondary exhaust disappears
Sound device then requires ambient noise value according to use occasion and is configured by third party.It is mostly resistance for level-one exhaust silencer
Silencer, secondary exhaust silencer is then varied, and wherein impedance complex formula is in the majority.Existing impedance complex formula exhaust silencer is deposited
Technological deficiency be mainly that tolerable temperature is low, using the general tolerable temperature of the silencer of mineral wool sound-absorbing material be no more than 250
DEG C, while low frequency eliminates the noise and only focuses on 1~2 center frequency-band.
Utility model content
The utility model is in order to overcome the shortcomings in the prior art, to provide a kind of impedance complex formula exhaust of generating set
Silencer, the combined type noise-cancelling theory combined using resistance noise reduction and resonant cavity reactive muffling, can not only divulge information but also can disappear
Sound can make resistive and reactive muffling reach optimum value, i.e. each frequency band of 250HZ low-frequency range is eliminated the noise, and sound level sound deadening capacity can reach
35dB (A), while its tolerable temperature is increased to 600 DEG C.
The utility model to achieve the above object, is achieved through the following technical solutions, a kind of impedance complex of generating set
Formula exhaust silencer, including exhaust silencer ontology, it is characterized in that: the exhaust silencer ontology includes resonant cavity and variable diameter
Section, cylindrical resonator cavity body both ends are connected with truncated cone-shaped reducer and constitute whole exhaust silencer outer housing, the resonant cavity
Interior to be equipped with impedance complex formula silencing channel, impedance complex formula silencing channel mainly constitutes several resonance by multistage resonance microwell plate
Chamber, several resonant cavities form impedance complex formula silencing channel, and the resonance microwell plate includes resistive absorbent treatment face plate, resonance
Lumen pore plate and resonant cavity cavity plate, resonant cavity cavity plate shape is cylindrical, is successively equipped with ring from outside in resonant cavity cavity plate
Shape resonant cavity orifice plate and the resistive sound absorption orifice plate of annular, constitute resonance between ring resonance orifice plate and the resistive sound absorption orifice plate of annular
Chamber.
The resonance microwell plate is using 600 DEG C of temperature, the fiber multihole of the center frequency-band 500HZ to 8000HZ of acoustic absorptivity
Sound-absorbing material.
It is described resonance microwell plate with a thickness of 50mm-300mm.
The resonant cavity is respectively adopted different resonance micropore plate thickness and aperture, punching rate and volume and constitutes center frequency
Low-frequency impedance combined type silencing channel of the band from 31.5HZ to 250HZ.
Cylindrical resonator cavity body both ends have been respectively and fixedly connected with conical pod.
The utility model has the advantages that compared with prior art, the utility model is disappeared by what the multistage resonance microwell plate for being resistant to 600 DEG C was formed
Sound channel composition, it can divulge information and can eliminate the noise, and resistive and reactive muffling can be made to reach optimum value, sound level sound deadening capacity can
Reach 35dB (A).
Detailed description of the invention
Fig. 1 is the utility model structure diagram；
Fig. 2 is the A-A sectional view of Fig. 1；
Fig. 3 is that each band frequency of the utility model calculates sound deadening capacity curve graph；
Fig. 4 is the flange scheme of installation that silencer is connect with exhaust pipe.
In figure: 1, exhaust silencer ontology, 2, resonant cavity, 3, reducer, 4, resonance microwell plate, 5, resonant cavity, 6, resistance
Property absorbent treatment face plate, 7, resonant cavity orifice plate, 8, resonant cavity cavity plate, 9, pod, 10, muffler flange, 11, exhaust tube method
Orchid, sealing ring between 12, flange.
Specific embodiment
In conjunction with the preferred embodiment, to according to specific embodiment provided by the utility model, details are as follows:
It is detailed in attached drawing 1-2, present embodiment discloses a kind of impedance complex formula exhaust silencers of generating set, including exhaust
Muffler body 1, the exhaust silencer ontology include resonant cavity 2 and reducer 3, and cylindrical resonator cavity body both ends are connected with
Truncated cone-shaped reducer constitutes whole exhaust silencer outer housing, and impedance complex formula silencing channel, resistance are equipped in the resonant cavity
Anti- combined type silencing channel mainly constitutes several resonant cavities 5 by multistage resonance microwell plate 4, and it is multiple that several resonant cavities form impedance
Box-like silencing channel, the resonance microwell plate include resistive absorbent treatment face plate 6, resonant cavity orifice plate 7 and resonant cavity cavity plate 8,
Resonant cavity cavity plate shape is cylindrical, is successively equipped with ring resonance orifice plate outward certainly in resonant cavity cavity plate and annular is resistive
Absorb sound orifice plate, constitutes resonant cavity between ring resonance orifice plate and the resistive sound absorption orifice plate of annular.The resonance microwell plate is using temperature
The fiber multihole sound-absorbing material of 600 DEG C of degree, the center frequency-band 500HZ to 8000HZ of acoustic absorptivity.The thickness of the resonance microwell plate
Degree is 50mm-300mm.Different resonance micropore plate thickness and aperture, punching rate and volume structure is respectively adopted in the resonant cavity
Low-frequency impedance combined type silencing channel at center frequency-band from 31.5HZ to 250HZ.Cylindrical resonator cavity body both ends difference
It is connected with conical pod 9.
The present embodiment exhaust silencer outer housing diameter DN600 × 2400mm, with exhaust treatment system exhaust pipe both ends
Interface: round flange DN150；Resonant cavity hole board diameter be φ 300mm, resistive absorbent treatment face board diameter be respectively φ 219mm and
φ150mm。
It is applicable in air quantity: 1500-2000m3/ h, noise elimination frequency band feature: broadband noise elimination 31.5-8000HZ is effective.It eliminates the noise
Amount: 25dB；Drag losses: 80Pa.
Working principle
It is detailed in attached drawing 3, the resistance noise reduction Some principles of the present embodiment: mutually being tied using resistance noise reduction with resonant cavity reactive muffling
The combined type noise-cancelling theory of conjunction.Exhaust silencer resistance noise reduction part is mainly formed by the multistage resonance microwell plate for being resistant to 600 DEG C
Silencing channel composition, it can divulge information and can eliminate the noise.The sound-absorbing material filled in its resistance noise reduction layer is that can be resistant to
600 DEG C of temperature of fiber multihole sound-absorbing material, the acoustic absorptivity and centrifugally glass-wool plate of center frequency-band 500HZ to 8000HZ are basic
Unanimously, available good sound deadening capacity.
Resistance noise reduction channel sound deadening capacity formula: △ L=Ψ(σ)* P/S*l, wherein △ L is sound deadening capacity, Ψ(σ)For extinction coefficient
(and sound-absorbing material acoustic absorptivity is positively correlated), P are silencing channel perimeter, S is silencing channel area, l is silencing channel length.
This exhaust silencer resistance noise reduction part follows above-mentioned resistance noise reduction rule, is mainly characterized by the sound absorption used
Material is the fiber multihole sound-absorbing material that can be made with 600 DEG C of tolerable temperature of metal compound feedstock, resistance noise reduction thickness degree
From 50mm-300mm, determined according to sound deadening capacity size.Impedance complex formula silencing channel is mainly made of several resonant cavities, different
The resonant cavity of resonant frequency forms certain resonant silencing channel by permutation and combination to reach noise elimination effect.
Permutation and combination embodiment, as there is 6 resonant cavities in attached drawing 1,
Permutation and combination 1: the resonance centre frequency of corresponding n1 to n6 resonant cavity be followed successively by 31.5HZ, 63HZ, 125HZ,
250HZ,31.5HZ,63HZ；
Permutation and combination 2: the resonance centre frequency of corresponding n1 to n6 resonant cavity be followed successively by 31.5HZ, 63HZ, 31.5HZ,
63HZ,125HZ,250HZ；
Permutation and combination 3: the resonance centre frequency of corresponding n1 to n6 resonant cavity be followed successively by 250HZ, 125HZ, 63HZ,
31.5HZ,63HZ,31.5HZ；
Permutation and combination 4: the resonance centre frequency of corresponding n1 to n6 resonant cavity be followed successively by 31.5HZ, 63HZ, 125HZ,
250HZ, 63HZ, 31.5HZ etc..
Resonant cavity takes microwell plate resonance sound-absorbing structure, and different frequencies takes the resonant cavity of different structure.Resonant cavity master
It is used for low frequency noise elimination, center frequency-band to pass through different microwell plate plate thickness, aperture, punching rate, volume from 31.5HZ to 250HZ
Deng the available good low frequency sound deadening capacity of combination.Resonant frequency calculates formula: f0=c/2 π (p/ ((t+0.8d) L))1/2,
Wherein f0For resonant frequency, the c velocity of sound, P punching rate, t plate thickness, the aperture d, L resonant cavity depth.
Under the conditions of exhaust silencer internal structure is consistent, by the aperture of the different perforated plate of setting resonant cavity,
The punching rate of the thickness of perforated plate, perforated plate realizes that each resonant cavity generates own resonant frequency, to reach low frequency noise elimination
Effect.
RESONANT CAVITY MUFFLER sound deadening capacity: △ L=10lg (1+k2/(f/f0-f0/f)2), wherein △ L be sound deadening capacity, k together
Shake the related dimensionless number of chamber sound deadening capacity, f0It is the frequency for needing to eliminate the noise for resonant frequency, f.
The specific resonance sound-absorbing structure parameter of Fig. 3 calculated examples for example: P punching rate, t plate thickness, the aperture d, L resonant cavity
Depth
Manufacturing process:
1) reducer: main material stainless steel plate 304, plate shearing machine blanking → polishing corner → furling plate round machine edge rolling → welding →
Polishing polishing.
2) pod: main material stainless steel plate 304, plate shearing machine blanking → polishing corner → furling plate round machine edge rolling → welding →
Polishing polishing.
3) shell: main material stainless steel plate 304, plate shearing machine blanking → polishing corner → furling plate round machine edge rolling → welding → are beaten
Grind polishing.
4) resistive absorbent treatment (centered cylinder): including mask orifice plate+sound-absorbing material+skeleton.Mask orifice plate main material is not
Become rusty steel plate 304, plate shearing machine blanking → polishing corner → digital control perforating machine punching → edge rolling → welding → polishing polishing.Absorb sound material
Material: the fiber multihole sound-absorbing material of metal compound feedstock production.Skeleton: main material stainless steel plate 304, plate shearing machine blanking →
Polishing corner → bending machine folds into keel groove → welding → polishing polishing → formation cylinder cage.Assembling sequence: sound-absorbing material
Outsourcing glass wool cloth → in sound-absorbing material filling skeleton cage →, which tamps, paves → skeleton cage fixed mask orifice plate → polishing outside
Corner.
5) resistive absorbent treatment (cylinder ring being bonded with resonant cavity): including mask orifice plate+sound-absorbing material+skeleton.Mask hole
Plate main material stainless steel plate 304, plate shearing machine blanking → polishing corner → digital control perforating machine punching → edge rolling → welding → polishing
Polishing.Sound-absorbing material: the fiber multihole sound-absorbing material of metal compound feedstock production.Skeleton: main material stainless steel plate 304,
Plate shearing machine blanking → polishing corner → bending machine folds into keel groove → welding → polishing polishing → formation cylinder cage.It assembles suitable
Sequence: sound-absorbing material outsourcing glass wool cloth → sound-absorbing material filling skeleton cage in → tamp pave → skeleton cage outside fixed mask
Orifice plate → polishing corner.
6) resonant cavity: including resonant cavity orifice plate+skeleton.Resonant cavity orifice plate main material stainless steel plate 304, plate shearing machine
Blanking → polishing corner → digital control perforating machine punching → edge rolling → welding → polishing polishing.Skeleton: main material stainless steel plate
304, plate shearing machine blanking → polishing corner → bending machine folds into keel groove → welding → polishing polishing → formation cylinder cage.Group
Dress sequence: fixed mask orifice plate → polishing corner outside skeleton cage.
7) each component assembling sequence: it is interior and fixed → total that the resistive absorbent treatment of resonant cavity n1+ (cylinder ring) is packed into housing cylinder
It shakes in the resistive absorbent treatment of chamber n2+ (cylinder ring) loading housing cylinder and the resistive absorbent treatment of fixation → resonant cavity n3+ (cylinder ring) fills
Enter in housing cylinder and the resistive absorbent treatment of fixation → resonant cavity n4+ (cylinder ring) is packed into housing cylinder and fixation → resonant cavity n5
+ resistive absorbent treatment (cylinder ring) loading housing cylinder is interior and the resistive absorbent treatment of fixation → resonant cavity n6+ (cylinder ring) is packed into shell
In cylinder and fixed → resistive absorbent treatment (centered cylinder) is packed into housing cylinder and fixation → pod and resonant cavity n1 and n6
Fixation → air inlet reducer is connect with casing cylinder connection → outlet reducer with casing cylinder.
Be detailed in attached drawing 4, installation process: bracket or hanger installation fixation → exhaust silencer are placed on bracket or hanger just
Position → air inlet reducer is connect with generating set gas exhaust tube flange connection → outlet reducer with generating set gas exhaust tube flange.
The exhaust silencer course of work: the tail gas that generating set gives off is discharged from tail gas discharging pipe first, until exhaust disappears
The inlet end reducer entrance of sound device becomes after silencing channel inside exhaust silencer from outlet side into exhaust silencer
Diameter section outlet discharge then immediately proceeds to atmosphere or access exhaust pipe.This exhaust silencer sound wave enters from inlet end reducer
Mouth enters silencer, and sound wave enters resonant cavity noise elimination after eliminating the noise by resistive absorbent treatment immediately, as sound wave is along in silencer
Portion's airflow channel moves ahead, and sound wave is made an uproar after outlet side reducer outlet outflow by resistance noise reduction and resonant cavity noise elimination collective effect
Sound is effectively cut down.
Above-mentioned reference embodiment is explanation to a kind of detailed description of the impedance complex formula exhaust silencer of generating set
Property without being restrictive, several embodiments can be enumerated according to limited range, therefore do not departing from the utility model
Change and modification under general plotting should belong within the protection scope of the utility model.
Claims (5)
1. a kind of impedance complex formula exhaust silencer of generating set, including exhaust silencer ontology, it is characterized in that: the exhaust
Muffler body includes resonant cavity and reducer, and cylindrical resonator cavity body both ends are connected with truncated cone-shaped reducer and constitute whole row
Gas outer muffler case, is equipped with impedance complex formula silencing channel in the resonant cavity, impedance complex formula silencing channel mainly by
Multistage resonance microwell plate constitutes several resonant cavities, several resonant cavities form impedance complex formula silencing channel, and the resonance is micro-
Orifice plate includes resistive absorbent treatment face plate, resonant cavity orifice plate and resonant cavity cavity plate, and resonant cavity cavity plate shape is cylindrical, altogether
Ring resonance orifice plate and the resistive sound absorption orifice plate of annular, ring resonance orifice plate and ring are successively equipped with from outside in vibration chamber cavity plate
Resonant cavity is constituted between form drag sound absorption orifice plate.
2. the impedance complex formula exhaust silencer of generating set according to claim 1, it is characterized in that: the resonance micropore
Plate is using 600 DEG C of temperature, the fiber multihole sound-absorbing material of the center frequency-band 500HZ to 8000HZ of acoustic absorptivity.
3. the impedance complex formula exhaust silencer of generating set according to claim 1 or 2, it is characterized in that: the resonance
Microwell plate with a thickness of 50mm-300mm.
4. the impedance complex formula exhaust silencer of generating set according to claim 1, it is characterized in that: the resonant cavity point
Resonance micropore plate thickness that Cai Yong be not different and aperture, punching rate and volume constitute center frequency-band from 31.5HZ to 250HZ
Low-frequency impedance combined type silencing channel.
5. the impedance complex formula exhaust silencer of generating set according to claim 1, it is characterized in that: described cylindrical total
Vibration cavity both ends have been respectively and fixedly connected with conical pod.
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| CN201920302665.6U CN209704671U (en) | 2019-03-11 | 2019-03-11 | The impedance complex formula exhaust silencer of generating set |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112712785A (en) * | 2020-12-29 | 2021-04-27 | 北京航天益森风洞工程技术有限公司 | Silencer suitable for high-speed wind tunnel stable section |
| CN115234524A (en) * | 2022-07-03 | 2022-10-25 | 中国船舶重工集团公司第七0三研究所 | Detachable low-noise steam jet compressor |
-
2019
- 2019-03-11 CN CN201920302665.6U patent/CN209704671U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112712785A (en) * | 2020-12-29 | 2021-04-27 | 北京航天益森风洞工程技术有限公司 | Silencer suitable for high-speed wind tunnel stable section |
| CN115234524A (en) * | 2022-07-03 | 2022-10-25 | 中国船舶重工集团公司第七0三研究所 | Detachable low-noise steam jet compressor |
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